API STD 510 – 2001 pdf free download

API STD 510 – 2001 pdf free download.Design and Construction of LPG Installations.
3 Terms and Definitions Some of the terms used in this standard are deÞned in 3.1 through 3.13. 3.1 aboveground tank or aboveground vessel: a tank or vessel all or part of which is exposed above grade. 3.2 autorefrigeration: the chilling effect of vaporization of LPG when it is released or vented to a lower pressure. 3.3 boiling-liquid expanding-vapor explosion (BLEVE): the phenomenon of a pressurized LPG tank failing such as can occur from direct exposure to a Þre (normally a catastrophic event). 3.4 installations: tanks, vessels, pumps, compressors, accessories, piping, and all other associated equipment required for the receipt, transfer, storage, and shipment of LPG. 3.5 liquefied petroleum gas (LPG or LP-gas): any material in liquid form that is composed predominantly of any of the following hydrocarbons or of a mixture thereof: propane, propylene, butanes (normal butane or isobutane), and butylenes. 3.6 mounded tank or mounded vessel: a tank or ves- sel located above or partially above the general grade level but covered with earth, sand, or other suitable material. 3.7 refrigerated storage: storage in a vessel or tank arti- Þcially maintained at a temperature below the nominal ambi- ent temperature. 3.8 rollover: the spontaneous and sudden movement of a large mass of liquid from the bottom to the top surface of a refrigerated storage reservoir due to an instability caused by an adverse density gradient. Rollover can cause a sudden pressure increase and can affect vessel integrity. 3.9 shall: indicates provisions that are mandatory. 3.10 Use of the term shall consider directly before a design or construction factor (such as a force or safety) indi- cates that the factorÕs effects and signiÞcance shall be evalu- ated using good engineering judgement-through an examination or test if appropriate-and the design may or may not be adjusted accordingly. 3.11 tank or vessel: a container used for storing LPG.
4 Design of LPG Vessels 4.1 APPLICABLE DESIGN CONSTRUCTION CODES 4.1.1 Vessels shall meet the requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 or 2. 4.1.2 When complete rules for any speciÞc design are not given, the manufacturer, subject to the approval of the pur- chaser, shall provide a design as safe as would be provided in the currently applicable code listed in 4.1.1. 4.2 DESIGN PRESSURE AND TEMPERATURE 4.2.1 The design pressure of LPG vessels shall not be less than the vapor pressure of the stored product at the maximum product design temperature. The additional pressure resulting from the partial pressure of noncondensable gases in the vapor space and the hydrostatic head of the product at maximum Þll shall be considered. Ordinarily, the latter considerations and the performance speciÞcations of the relief valve require a dif- ferential between design pressure and maximum product vapor pressure that is adequate to allow blowdown of the pres- sure relief valve (see API RP 520).
4.4 MATERIALS OF CONSTRUCTION 4.4.1 All materials of construction shall meet the require- ments of Section II of the ASME Boiler and Pressure Vessel Code. 4.4.2 Low-melting-point materials of construction, such as aluminum and brass, shall not be used for LPG vessels. 4.5 VESSEL CONNECTIONS 4.5.1 The number of penetrations in any vessel shall be minimized, particulary those located below the working liq- uid level (i.e., below the vapor space). 4.5.2 Flange connections shall be a minimum of ASME Class 150. All Þttings shall be a minimum of NPS 3 Ú 4 . 4.5.3 Refer to Section 8 for piping requirements. 4.6 PREVIOUSLY CONSTRUCTED VESSELS API 510 shall be used where an existing vessel is to be relocated or reused in a new service. 5 Sitting Requirements and Spill Containment 5.1 SITING 5.1.1 General 5.1.1.1 Site selection is meant to minimize the potential risk to adjacent property presented by the storage facility and the risk presented to the storage facility by a Þre or explosion on adjacent property. The following factors shall be consid- ered in site selection: a. Proximity to populated areas. b. Proximity to public ways. c. Risk from adjacent facilities. d. Storage quantities. e. Present and predicted development of adjacent properties. f. Topography of the site, including elevation and slope. g. Access for emergency response. h. Availability of needed utilities. i. Requirements for the receipt and shipment of products.